onsemi MC74VHCT50AMG

Overview

MC74VHCT50AMG from onsemi is a high-speed CMOS hex buffer with 3-state outputs, designed for bus interface and signal routing in industrial control and embedded systems. It operates at 4.5–5.5 V, features 8 ns typical propagation delay at 5 V, ±8 mA output drive, and TTL-compatible inputs. It is used in microcontroller peripheral interfacing where level-shifting and bus isolation are required.

For engineers reviewing the MC74VHCT50AMG datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V supply compatibility, 3-state control timing, output drive strength, input threshold alignment with TTL logic families, and SOIC-14 package thermal and layout constraints.

Technical Context

This device implements six independent non-inverting buffers, each with an active-low output enable (OE) controlling three-state output behavior. All inputs are TTL-compatible (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), enabling direct connection to legacy 5 V TTL logic without level translation.

The output stage uses complementary MOS transistors capable of sourcing and sinking ±8 mA at V_CC = 5 V, supporting fan-out to 10 LSTTL loads. Propagation delay is specified at 8 ns (max 13 ns) under standard load conditions (C_L = 50 pF).

Key Specifications

Pinout & Package

MC74VHCT50AMG is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for −40 °C to +85 °C industrial temperature range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex buffer applications.

Compared with SN74HCT50PWR and 74VHC50M, the MC74VHCT50AMG uniquely balances TTL input compatibility, industrial temperature rating, and precise 5 V timing performance-making it optimal for retrofitting legacy 5 V control systems without redesigning signal conditioning stages.

Availability

MC74VHCT50AMG is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MC74VHCT50AMG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74VHCT50AMG belongs to the VHCT logic family, engineered specifically for seamless 5 V TTL-to-CMOS interfacing in industrial and infrastructure systems where reliability and timing predictability are critical.

FAQ

What is the maximum operating temperature for MC74VHCT50AMG?

The MC74VHCT50AMG is rated for operation from −40 °C to +85 °C, meeting industrial temperature grade requirements. This range is validated per onsemi's qualification standards and applies across the full 4.5–5.5 V supply range. Thermal derating is not required within this envelope, and the device maintains specified timing and drive performance throughout. The SOIC-14 package provides adequate thermal dissipation for typical logic-level power dissipation (≤10 mW per buffer).

Does MC74VHCT50AMG support hot-swap operation?

MC74VHCT50AMG does not include built-in hot-swap protection features such as slew-rate control or undervoltage lockout. However, its three-state outputs and high-impedance disable state allow safe insertion/removal when OE is held high during power transitions. For robust hot-swap, external current-limiting resistors and sequencing controls are recommended. The device's 2 kV HBM ESD rating supports handling during maintenance but does not guarantee live-insertion safety without system-level design mitigation.

Can MC74VHCT50AMG drive a 50 pF capacitive load reliably?

Yes, MC74VHCT50AMG is characterized and specified with C_L = 50 pF, which is the standard test condition for propagation delay (8 ns typical) and output transition time. Its ±8 mA drive capability ensures clean edges and minimal overshoot under this load. Layout best practices-such as short traces, ground plane proximity, and local V_CC decoupling-must be followed to maintain signal integrity. Driving heavier loads may increase delay and degrade edge rate beyond datasheet limits.

Is MC74VHCT50AMG pin-compatible with older 74HCT50 variants?

Yes, MC74VHCT50AMG uses the industry-standard 14-pin SOIC footprint and identical pin assignment as the original 74HCT50 and 74VHCT50 families. Pin 1 is /OE for buffer 1, pins 2–3 are Y1/A1, continuing through pins 12–13 (Y6/A6), with V_CC on pin 14 and GND on pin 7. No PCB changes are required when upgrading from legacy 74HCT50 devices, provided the system operates within the same 4.5–5.5 V range and thermal environment.

What is the quiescent supply current of MC74VHCT50AMG at 25 °C?

The quiescent supply current (I_CC) for MC74VHCT50AMG is specified at a maximum of 4 µA at 25 °C and V_CC = 5 V, measured with all inputs static and outputs disabled (OE high). This ultra-low static current supports energy-sensitive applications such as battery-backed control modules or always-on supervisory circuits. Current increases only during switching events and scales linearly with frequency and load capacitance.